fix 'make test' for HP NonStop

This fixes the vast majority of test failures on HP NonStop.
Some test don't work with /bin/diff, some fail with /bin/tar,
so let's put /usr/local/bin in PATH first.
Some tests fail with /bin/sh (link to /bin/ksh) so use bash instead

Signed-off-by: Joachim Schmitz <jojo@schmitz-digital.de>
Signed-off-by: Jeff King <peff@peff.net>

Makefile

@@ -1380,6 +1380,10 @@ ifeq ($(uname_S),NONSTOP_KERNEL)
 	MKDIR_WO_TRAILING_SLASH = YesPlease
 	# RFE 10-120912-4693 submitted to HP NonStop development.
 	NO_SETITIMER = UnfortunatelyYes
+	SANE_TOOL_PATH=/usr/coreutils/bin:/usr/local/bin
+	SHELL_PATH=/usr/local/bin/bash
+	# as of H06.25/J06.14, we might better use this
+	#SHELL_PATH=/usr/coreutils/bin/bash
 endif
 ifneq (,$(findstring MINGW,$(uname_S)))
 	pathsep = ;